US8771043B2 - Rotary dresser - Google Patents

Rotary dresser Download PDF

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Publication number
US8771043B2
US8771043B2 US13/171,744 US201113171744A US8771043B2 US 8771043 B2 US8771043 B2 US 8771043B2 US 201113171744 A US201113171744 A US 201113171744A US 8771043 B2 US8771043 B2 US 8771043B2
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US
United States
Prior art keywords
abrasive grains
roll
diamond abrasive
portions
rotary dresser
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US13/171,744
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English (en)
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US20120108153A1 (en
Inventor
Sadao SAKAKIBARA
Shinji Soma
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyoda Van Moppes Ltd
JTEKT Corp
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Toyoda Van Moppes Ltd
JTEKT Corp
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Application filed by Toyoda Van Moppes Ltd, JTEKT Corp filed Critical Toyoda Van Moppes Ltd
Assigned to TOYODA VAN MOPPES LTD., JTEKT CORPORATION reassignment TOYODA VAN MOPPES LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SAKAKIBARA, SADAO, SOMA, SHINJI
Publication of US20120108153A1 publication Critical patent/US20120108153A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
    • B24B53/12—Dressing tools; Holders therefor
    • B24B53/14—Dressing tools equipped with rotary rollers or cutters; Holders therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
    • B24B53/06—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels
    • B24B53/07—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels by means of forming tools having a shape complementary to that to be produced, e.g. blocks, profile rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D5/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
    • B24D5/14—Zonally-graded wheels; Composite wheels comprising different abrasives

Definitions

  • the present invention relates to a rotary dresser having diamond abrasive grains arranged on an outer circumference of a roll.
  • Rotary dressers with a plurality of the diamond abrasive grains embedded on an outer circumferential surface of a rotatable roll are well-known as described in, e.g., JP 2009-285776 A.
  • diamond abrasive grains are usually arranged spirally at a predetermined interval on an outer circumferential surface of a roll, so that the distribution density of the diamond abrasive grains per area is made to be fixed.
  • the distribution density of diamond abrasive grains 5 is set to be fixed at the arc portion 3 .
  • the number of the diamond abrasive grains 5 which are arranged on the concave arc portion 3 in the circumferential direction differs in dependence on the circumferential length at each of axial positions of the concave arc portion 3 .
  • the number of the diamond abrasive grains 5 in the circumferential direction (i.e., the quantity of diamond in the circumferential direction) becomes smaller at a small-diameter portion of the arc portion 3 , while the number of the diamond abrasive grains 5 in the circumferential direction becomes larger as the axial position comes close to each of both end portions on the arc portion 3 .
  • the number of the diamond abrasive grains which act on a grinding wheel per rotation of the dresser is increased at a portion that has a large number of the diamond abrasive grains in the circumferential direction. This results in increasing the dressing resistance at that portion and hence, in causing grinding burns to be liable to be generated on the grinding wheel.
  • the number of the diamond abrasive grains which act on the grinding wheel per rotation of the dresser is decreased at another portion that has a small number of the diamond abrasive grains in the circumferential direction.
  • the diamond abrasive grains at such another portion become larger in wear than those at the portion having the large number of diamond abrasive grains, and this gives rise to a problem that local wear or abrasion are liable to occur.
  • an object of the present invention is to provide a rotary dresser capable of maintaining the shape accuracy thereof over a long term as a result of decreasing the dressing resistance and suppressing local wear by equalizing the numbers of diamond abrasive grains in the circumferential direction at any axial positions.
  • an improved rotary dresser comprising a roll having an outer circumferential surface which includes an arc portion or inclined portion differing in diameter in dependence on an axial position thereof, and a plurality of diamond abrasive grains embedded on the outer circumferential surface of the roll.
  • the number of the diamond abrasive grains in a circumferential direction is fixed even at any axial position on the outer circumferential surface of the roll.
  • the rotary dresser is provided with the roll having the outer circumferential surface which includes the arc portion or inclined portion differing in diameter in dependence on the axial position thereof, and the plurality of diamond abrasive grains embedded on the outer circumferential surface of the roll, and the number of the diamond abrasive grains in the circumferential direction is fixed even at any axial position on the outer circumferential surface of the roll. Therefore, the number of the diamond abrasive grains which act on a grinding wheel per rotation of the dresser is maintained unchanged even at any axial position. As a result, the resistance during dressing can be reduced, and the local wear of the diamond abrasive grains can be suppressed, so that the shape accuracy which is liable to change can be maintained accurate over a long term.
  • FIG. 1 is a front view of a rotary dresser in a first embodiment according to the present invention, wherein a graph is provided to show the quantities of diamond at respective portions on the rotary dresser;
  • FIG. 2 is an explanatory view for explaining the arrangement of diamond abrasive grains at a concave arc portion of the roll;
  • FIG. 3 is another explanatory view for explaining the arrangement of diamond abrasive grains at the concave arc portion of the roll;
  • FIG. 4 is an explanatory view for explaining the arranging state of the diamond abrasive grains in the circumferential direction at respective axial positions of the roll;
  • FIG. 5 is a front view of a rotary dresser in a second embodiment according to the present invention, wherein a graph is provided to show the quantities of diamond at respective portions on the rotary dresser;
  • FIGS. 6(A) and 6(B) are schematic views respectively showing modifications in the present invention.
  • FIG. 7 is a view showing the arranging state of diamond abrasive grains in the prior art.
  • FIG. 1 shows a rotary dresser 10 .
  • the rotary dresser 10 is composed of a rotatable roll 11 and a plurality of diamond abrasive grains 12 embedded on an outer circumferential surface of the roll 11 .
  • the diamond abrasive grains 12 are spirally arranged on the outer circumferential surface of the roll 11 .
  • the roll 11 is provided with cylindrical cylinder portions 11 a , 11 b at both end portions in the axial direction thereof and is also provided with a concave semicircular arc portion 11 c between these cylinder portions 11 a and 11 b . Both ends of the concave arc portion 11 c in the axial direction are connected to edges of the cylinder portions 11 a and 11 b .
  • the concave arc portion 11 c is the largest in diameter at the both axial end portions and is the smallest in diameter at the axial center portion.
  • diamond abrasive grains 12 are arranged in almost even distribution density so that a fixed number (N1 pieces) of the diamond abrasive grains 12 exist in the circumferential direction even at any position in the axial direction.
  • diamond abrasive grains 12 are arranged so that another fixed number (N2 pieces) of the diamond abrasive grains 12 exist in the circumferential direction even at any position (in any area) in the axial direction.
  • the distribution density of the diamond abrasive grains 12 at the concave arc portion 11 c is made to differ in dependence on the diameters (i.e., circumferential lengths) at respective axial positions on the concave arc portion 11 c .
  • the number N2 of the diamond abrasive grains 12 on any circumference (the quantity of diamond on any circumference) of the concave arc portion 11 c is made to be larger than the number N1 of the diamond abrasive grains 12 on any circumference of each of the cylinder portions 11 a , 11 b (N2>N1).
  • N2>N1 the number of the diamond abrasive grains 12 on any circumference of each of the cylinder portions 11 a , 11 b
  • N2>N1 the number of the diamond abrasive grains 12 on any circumference of each of the cylinder portions 11 a , 11 b
  • the concave arc portion 11 c and each of the cylinder portions 11 a , 11 b may be equal in the number of the diamond abrasive grains 12 on any circumference thereof.
  • the roll 11 is divided into a plurality of short widths (a) in the axial direction, and within each of the short widths (a), the diamond abrasive grains 12 are arranged in a zigzag fashion so that they are at a fixed interval (B 1 , B 2 , . . . or B 5 ) in the circumferential direction and differ in the axial position.
  • the circumferential length of the roll 11 continuously changes in dependence on the axial position, and therefore, as also shown in FIG. 3 , the closer the axial position of the roll 11 comes to the center position, the narrower the interval of the diamond abrasive grains 12 in the circumferential direction is made to become (B 1 >B 2 > . . . >B 5 ).
  • intervals B 1 ⁇ B 5 in the circumferential direction of the diamond abrasive grains 12 within the respective shorts widths (a) are changed in proportion to the respective circumferential lengths A 1 ⁇ A 5 on the roll 11 , and the diamond abrasive grains 12 of the predetermined or fixed number are arranged at an equiangular interval within each short width (a).
  • FIG. 3 Broken lines in FIG. 3 indicate imaginary lines for arrangements of the diamond abrasive grains 12 which are to be spirally arranged on the concave arc portion 11 c of the roll 11 .
  • both end cylinder portions 11 a , 11 b do not change (i.e., is fixed) in diameter over the entire lengths thereof in the axial direction.
  • the diamond abrasive grains 12 are arranged at a uniform density as is the case of the prior art, it is possible to make the number of the diamond abrasive grains in the circumferential direction fixed even at any axial position.
  • FIG. 5 shows a rotary dresser 10 in a second embodiment, wherein the differences from the first embodiment reside in that the number of the diamond abrasive grains 12 in the circumference direction at each of boundary portions 11 d , 11 e (corner portions of the concave arc portion 11 c ) between the cylinder portions 11 a , 11 b and the concave arc portion 11 c of the roll 11 is increased (by, e.g., 60 pieces) than that of the diamond abrasive grains 12 in the circumferential direction at any axial position on the concave arc portion 11 c.
  • the number of the diamond abrasive grains 12 is increased in the circumference direction at each of boundary portions 11 d , 11 e between the cylinder portions 11 a , 11 b and the concave arc portion 11 c of the roll 11 . Therefore, the shape accuracy at the boundary portions 11 d , 11 e which are liable to change can be maintained over a long term.
  • the number of the diamond abrasive grains 12 is fixed in the circumferential direction at any axial position on the concave arc portion 11 c .
  • the resistance during dressing can be reduced, and the local wear of the diamond abrasive grains 12 can be suppressed, so that it is possible to maintain the shape accuracy of the rotary dresser 10 accurate over a long term.
  • the present invention is not limited to the rotary dresser of such shape.
  • the present invention is also applicable to arranging diamond abrasive grains on the outer circumferential surface of a roll 111 provided with inclined portions 111 a , 111 b or another roll 211 provided with cylinder portions 211 a , 211 b and a convex arc portion 211 c . That is, the present invention is applicable to rotary dressers of various kinds which use a roll with a cylindrical portion being not uniform in diameter.
  • the rotary dresser according to the present invention is suitable for application to those in which diamond abrasive grains are arranged on the outer circumference of a roll having an outer circumferential surface whose diameter differs in dependence on the axial direction.
  • the rotary dresser 10 is provided with the roll 11 having the outer circumferential surface which includes the arc portion 11 c , 211 c or inclined portion 11 a , 11 b differing in diameter in dependence on the axial position thereof, and the plurality of diamond abrasive grains 12 embedded on the outer circumferential surface of the roll 11 , and the number of the diamond abrasive grains 12 in the circumferential direction is fixed even at any axial position on the outer circumferential surface of the roll 11 .
  • the number of the diamond abrasive grains 12 which act on a grinding wheel per rotation of the dresser 10 is maintained unchanged at any axial positions.
  • the resistance during dressing can be reduced, and the local wear of the diamond abrasive grains 12 can be suppressed, so that the shape accuracy liable to change can be maintained accurate over a long term.
  • the outer circumferential surface of the roll 11 is composed of the cylinder portions 11 a , 11 b at both axial end positions and the concave arc portion 11 c between the cylinder positions 11 a , 11 b .
  • the rotary dresser 10 wherein each of the cylinder portions 11 a , 11 b has the diamond abrasive grains 12 arranged in even distribution density, while the concave arc portion 11 c has the diamond abrasive grains 12 of the fixed number arranged in the circumference direction at any axial positions thereof.
  • the number of the diamond abrasive grains 12 in the circumferential direction at the boundary portion 11 d , 11 e between each of the cylinder portions 11 a , 11 b and the concave arc portion 11 c is increased than that of the diamond abrasive grains 12 in the circumferential direction at any axial position on the concave arc portion 11 c . Therefore, the shape accuracy at the boundary portions 11 d , 11 e liable to change can be maintained accurate over a long term.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
US13/171,744 2010-10-27 2011-06-29 Rotary dresser Active 2032-05-08 US8771043B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010241412A JP5693144B2 (ja) 2010-10-27 2010-10-27 ロータリドレッサ
JP2010-241412 2010-10-27

Publications (2)

Publication Number Publication Date
US20120108153A1 US20120108153A1 (en) 2012-05-03
US8771043B2 true US8771043B2 (en) 2014-07-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
US13/171,744 Active 2032-05-08 US8771043B2 (en) 2010-10-27 2011-06-29 Rotary dresser

Country Status (5)

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US (1) US8771043B2 (de)
EP (1) EP2447005B1 (de)
JP (1) JP5693144B2 (de)
CN (1) CN102452046B (de)
TW (1) TWI533972B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140235148A1 (en) * 2011-09-28 2014-08-21 Domenico Privitera Peripheral wheel for machining the edges of slabs
US20180043503A1 (en) * 2015-03-18 2018-02-15 Erwin Junker Maschinenfabrik Gmbh Method and grinding machine for grinding grooved workpieces
US10537976B2 (en) * 2017-06-09 2020-01-21 Nsk Ltd. Former rotary dresser and dressing method

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150065722A (ko) * 2012-10-10 2015-06-15 아사히 가라스 가부시키가이샤 탄성 지석의 드레싱 방법
GB201504759D0 (en) * 2015-03-20 2015-05-06 Rolls Royce Plc Abrading tool for a rotary dresser
DE102016006951B4 (de) * 2016-06-08 2018-05-09 KAPP Werkzeugmaschinen GmbH Verfahren zum Herstellen eines Abrichtwerkzeugs für ein Schleifwerkzeug
GB201709626D0 (en) 2017-06-16 2017-08-02 Rolls Royce Plc Abrasive machining
CN107225515B (zh) * 2017-07-11 2023-06-30 苏州精协机械制造有限公司 挤压丝锥螺纹磨床的组合式多线磨轮
JP2020179431A (ja) * 2019-04-23 2020-11-05 株式会社ジェイテクト 砥石車のドレッシング方法及び砥石車修正装置
TWI747748B (zh) * 2021-02-24 2021-11-21 嘉寶自然工業股份有限公司 砂輪修整器的製造方法及砂輪修整器
TW202430327A (zh) 2022-11-07 2024-08-01 日商聯合材料股份有限公司 旋轉修整器

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US2014955A (en) * 1933-05-06 1935-09-17 Gen Electric Method of making an abrasive tool
US2443370A (en) * 1945-03-01 1948-06-15 Anton Smit & Co Inc Wheel-dressing tool
US2827037A (en) * 1954-12-13 1958-03-18 Wheel Trueing Tool Co Form dressing assembly
US3347219A (en) * 1964-09-30 1967-10-17 Abrasive Dressing Tool Company Diamond dressing tool
US3398989A (en) * 1966-11-14 1968-08-27 Christensen Diamond Prod Co Diamond milling or planer cutters
US3602209A (en) * 1968-07-16 1971-08-31 Fritz Bocker Dressing tool for forming and dressing helically ribbed grinding wheels
US3626435A (en) * 1970-09-11 1971-12-07 Sidley Diamond Tool Co Dressing roll
US4175537A (en) * 1973-08-29 1979-11-27 Dieter Wiener Dressing arrangement for grinding wheel of a gear form grinding machine
US4805586A (en) * 1986-07-30 1989-02-21 Ernst Winter & Sohn (Gmbh & Co.) Dressing tool for grinding wheels
US5020282A (en) * 1988-04-02 1991-06-04 Sankyo Rikagaku Co., Ltd. Grinding tool and method of making the same
WO1992019422A1 (en) 1991-05-03 1992-11-12 Redis S.R.L. Diamond-studded tool for dressing grinders, with a cone-shaped rolling means, on an oblique axis
US5496208A (en) * 1989-12-20 1996-03-05 Neff; Charles E. Grinding wheel
US5769700A (en) * 1996-09-10 1998-06-23 Norton Company Grinding wheel
US6361412B1 (en) * 1998-02-17 2002-03-26 Michael Kaiser Process and rotary point crush truer for dressing grinding wheels with profiled working surfaces
US20020068518A1 (en) * 1998-02-06 2002-06-06 3M Innovative Properties Company Grinding wheel
US6561879B2 (en) * 2000-10-23 2003-05-13 Wendt Gmbh Conditioning device for grinding wheels
US20060286911A1 (en) * 2003-06-23 2006-12-21 Smarsh Steven G Non-glazing dressing wheel
US7153201B2 (en) * 2004-07-12 2006-12-26 Smith Abrasives, Inc. Oval sharpening rod having interrupted diamond coated surface and process of manufacturing same
JP2009285776A (ja) 2008-05-29 2009-12-10 Jtekt Corp 研削装置

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JP2002224965A (ja) * 2001-01-31 2002-08-13 Noritake Super Abrasive:Kk 眼鏡レンズの端面加工用砥石
JP2004098200A (ja) * 2002-09-06 2004-04-02 Meiji Univ 円筒研削盤用ロータリードレッサ
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US2014955A (en) * 1933-05-06 1935-09-17 Gen Electric Method of making an abrasive tool
US2443370A (en) * 1945-03-01 1948-06-15 Anton Smit & Co Inc Wheel-dressing tool
US2827037A (en) * 1954-12-13 1958-03-18 Wheel Trueing Tool Co Form dressing assembly
US3347219A (en) * 1964-09-30 1967-10-17 Abrasive Dressing Tool Company Diamond dressing tool
US3398989A (en) * 1966-11-14 1968-08-27 Christensen Diamond Prod Co Diamond milling or planer cutters
US3602209A (en) * 1968-07-16 1971-08-31 Fritz Bocker Dressing tool for forming and dressing helically ribbed grinding wheels
US3626435A (en) * 1970-09-11 1971-12-07 Sidley Diamond Tool Co Dressing roll
US4175537A (en) * 1973-08-29 1979-11-27 Dieter Wiener Dressing arrangement for grinding wheel of a gear form grinding machine
US4805586A (en) * 1986-07-30 1989-02-21 Ernst Winter & Sohn (Gmbh & Co.) Dressing tool for grinding wheels
US5020282A (en) * 1988-04-02 1991-06-04 Sankyo Rikagaku Co., Ltd. Grinding tool and method of making the same
US5496208A (en) * 1989-12-20 1996-03-05 Neff; Charles E. Grinding wheel
WO1992019422A1 (en) 1991-05-03 1992-11-12 Redis S.R.L. Diamond-studded tool for dressing grinders, with a cone-shaped rolling means, on an oblique axis
US5769700A (en) * 1996-09-10 1998-06-23 Norton Company Grinding wheel
US20020068518A1 (en) * 1998-02-06 2002-06-06 3M Innovative Properties Company Grinding wheel
US6361412B1 (en) * 1998-02-17 2002-03-26 Michael Kaiser Process and rotary point crush truer for dressing grinding wheels with profiled working surfaces
US6561879B2 (en) * 2000-10-23 2003-05-13 Wendt Gmbh Conditioning device for grinding wheels
US20060286911A1 (en) * 2003-06-23 2006-12-21 Smarsh Steven G Non-glazing dressing wheel
US7153201B2 (en) * 2004-07-12 2006-12-26 Smith Abrasives, Inc. Oval sharpening rod having interrupted diamond coated surface and process of manufacturing same
JP2009285776A (ja) 2008-05-29 2009-12-10 Jtekt Corp 研削装置

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140235148A1 (en) * 2011-09-28 2014-08-21 Domenico Privitera Peripheral wheel for machining the edges of slabs
US20180043503A1 (en) * 2015-03-18 2018-02-15 Erwin Junker Maschinenfabrik Gmbh Method and grinding machine for grinding grooved workpieces
US10532443B2 (en) * 2015-03-18 2020-01-14 Erwin Junker Maschinenfabrik Gmbh Method and grinding machine for grinding grooved workpieces
US10537976B2 (en) * 2017-06-09 2020-01-21 Nsk Ltd. Former rotary dresser and dressing method

Also Published As

Publication number Publication date
TWI533972B (zh) 2016-05-21
EP2447005A2 (de) 2012-05-02
JP2012091292A (ja) 2012-05-17
TW201233499A (en) 2012-08-16
CN102452046B (zh) 2016-01-20
US20120108153A1 (en) 2012-05-03
JP5693144B2 (ja) 2015-04-01
CN102452046A (zh) 2012-05-16
EP2447005B1 (de) 2016-12-14
EP2447005A3 (de) 2014-04-23

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